n=4的一些解决方案:
..0....2....2....2....0....0....2....2....1....2....0....1....2....1....0....0
..2....1....2....0....0....0....0....0....1....1....1....1....1....2....2....1
..0....0....1....0....0....0....1....2....0....1....2....1....0....2....2....0
..1....1....1....2....0....1....1....1....1....2....0....2....1....2....2....1
..1…..1…..2…..2…..1…..0…..2…..1…..0…..2…..1…..1…..0…..1
..0....0....1....1....1....2....2....0....0....2....0....1....0....0....1....0
..1....2....0....2....1....0....1....1....0....0....2....0....0....0....2....0
..1....2....0....2....1....2....1....0....0....0....0....2....0....0....1....1
..0....1....2....1....2....0....0....1....0....0....1....0....1....2....2....1
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